Frangois martenot



(No Model. RTENOT,

ELEGTRIOAL APPARATUS FOR REGULATING sTBANi BOILERS, 6w. No. 406,751. Patented July 1889.

2:121 c 6 c /c o 55d 0 h Gigi 0'8 7111" 5. (man. 3W 64 W v .Adavma:

N. PEIERS. Phnlo-Lilhognphar, Wnhington. n. c.

UNITED STATES PATENT OFFICE.

FRANQOIS MARTENOT, OF PARIS, FRANCE.

ELECTRICAL APPARATUS FOR REGULATING STEAM-BOILERS, 80C.

SPECIFICATION forming part of Letters Patent No. 406,751,.d ated July 9, 1889.

Application filed June 27, 1887. Serial No. 242,592- (No model.) Patented in France March 10, 1887, No. 182,086i in Germany July 4,1887, No.- 6,138; in England July 8, 1887, No. 9,645, and in Belgium July 22,1887,N0. 78,297.

1887, No. 182,086; German Empire July 4:, 1887,

No. 6,138; Great Britain- July 8, 1887, No. 9,645, and Belgium July 22, 1887, No. 7 8,297 3) and I do hereby declare that the following is a full, clear, and exact description of the same.-

This invention consists in certain new and useful electrical apparatus to be combined with steam-boilers, &c., whereby the same may be regulated in the manner hereinafter described, the particular features for which protection by Letters Patent is desired being specified in the claims at the end of this description.

The nature of the invention will be understood on reference to the accompanying drawings, in which-- I Figure 1 is an exterior view of a portion of the front end of a steam-boiler with my apparatus applied thereto. Fig. 2 is an enlarged face view, and Fig. 3 an end View, of an apparatus connected with the boiler'for the purpose of effecting the automatic feed ing of water thereto. Fig. 4 is an enlarged face view of an apparatus connected with the boiler for the purpose of providing for the escape of the excess of steam in order to pre-' vent explosion. Fig. 5 is an enlarged view of the water-gage. Fig. 6 is a horizontal section taken in the line 1 2 of Fig. 5. Fig. 7 is an enlarged view of a manometer, hereinafter referred to.

The invention is equally applicable to steamboilers and apparatus of a similar character, such as those enumerated above. It is here shown as applied to the front portion of a steam-boiler A. 011 the top of the boiler is arranged a manometer B, and to the front end of the boiler is attached a water-gage q.

At any suitable distance from the boiler A p are placed two electric batteries z and z, and at any other suitable point more or less distant from said boiler and the batteries and a water well or reservoir are placed two ap* paratuses a and a, which, in connection with the two electric batteries, accomplish the above-mentioned results, as hereinafter more particularly described.

The battery z is connected with the escapepipe, and is provided with a wire connected to the hand on of the manometer, which indicates the degree of pressure, and another wire ending at the binding-post or terminal of the apparatus a. A third wire connects the terminal f of said apparatus a with a hand on, which is attached on the rear side of the manometer. the degree indicating the pressure beyond which an explosion would be liable to take place. At the upper end of said hand 00 is a tongue 'or spur, which extends through a curved slot 1 in the upper portion of the casing of the manometer, so that when the hand a moves a suflicient distance toward the hand at said hand so comes in contact with said tongue or spur.

The battery ,2, which connects with the pipe for feeding water to the boiler, is provided with a wire extending to a terminal 0 on the water-gage q and another wire con-' nected to the terminal f of apparatus a. A third wire connects the terminal f on said apparatus with the terminal '0 of the watergage l- Referring to Figs. 2 and 3, (1. represents an apparatus which has for its object the automatic feeding of water to the boiler A. It is constructed with a metal plate arranged at any suitable point Within reach of the boiler This hand is placed opposite a A in a vertical plane with relation to the desired purpose. At the back of said plateis suitably secured awater-feeding pipe g, which connects the boiler A witha water-tank having a rather high level of water. At a suitable point in the pipe g is a two-way cook or valve, the plug of which is extended and forms the axis of rotation for a wheel b attached thereto. This wheel has one or more grooves on its periphery, and projecting from its inner side are four pegs b. On the grooved periphery of this wheel is wound a chain, at the lower end of which is suspended a weight 1. The wheel has an intermittent rotary motion, which is regulated by a cam or curved sur face on the short arm of a bent lever c, whichengages with said pegs b successively. The lever c has its fulcrum in a lug 0 near the front edge of the plate and oscillates in a vertical plane. WVhen the lever is oscillated in the direction indicated by the arrow m, it releases one of the pegs b and allows the wheel I), actuated by the weight Z, to rotate a distance equal to one-fourth of its circumference to the next peg b, which movement opens the two-way cook or valve and establishes communication between the boiler A and the feed-water tank or reservoir to which the pipe g is connected.

At the lower end of the long arm of the bent lever c is a hook or catch 0', which engages with one end of a straight lever d, pivoted at i on the plate, so as to oscillate in a horizontal plane. The other end of said lever (1 covers an electro-magnet e e, which is attached to the same plate. When the magnet and the battery z are in communication, the magnet attracts the long arm of the lever d, by the oscillation of which the short arm is disengaged from the bent lever c, which, oscillating in the direction of the arrow m, releases the peg b and allows the wheel I) to make one-fourth of a revolution. A weight 0, attached to the lever, causes it to oscillate, so that its short arm will engage with another peg b, and its long arm will again automatically hook into engagement with the short arm of the lever 61. When the battery z is not in communication with the magnet, the long arm of the lever d is pressed outward, so as to insure the engagement of its short arm with the lever 0.

Referring to Fig. 4, a represents an apparatus by which provision is made for the escape of the excess of steam in order to prevent explosion. This apparatus is constructed on the same principle as the apparatus a above described, except that the wheel b, with its pegs,is replaced by a metallic rod k, which may be flat or square, as desired, and which slides freely in keepers, which hold it in place against the plate. The weightlis suspended from the lower end of said rod k, the upper end of which is connected by a chain with the handle of a cook or valve attached near the upper end of the escape-pipe. In the rod 70 is a notch which engages with the short arm of the lever c in a similar manner to the engagement of the pegs h of the wheel I), as above described.

WVhen the pressure of steam in the boiler turns the hand as of the manometer B, said hand is brought in contact with the tongue or spur extending from the hand as through the curved slot 3 The electric current is thus established and causes the disengagement of said rod 76 in the same manner as above described in the operation of the apparatus a. The disengagement of the rod 70 allows it to drop downward, which movement opens the cock or valve 7c and permits the escape of steam from the boiler. \Vh en a sufdownward and formed into a fOlks. the water in the water-gage q is at the lowest level, one branch of the fork s enters the mer wire.

ficient quantity of steam has escaped, the rod 70 is raised by any suitable means until it engages again with the lever c, and the apparatus-is ready for another operation.

The water-gage is shown in an enlarged form in Fig. 5, and an attachment thereto is shown in horizontal section in Fig. 6. The water-gage consists of a glass tube provided at its upper and lower ends with the two cocks at and n, through which it communicates with the boiler. The cock at is surmounted by a cup -like chamber 19, which in turn is surmounted by a cap 0, screwed thereon. In the bottom of the cup or chamber 19 are two annular vessels to and 20', made of rubber, arranged concentrically with relation to each other, and each containing mercury. Through an aperture 20 in the center of the vessel w works a rod t, the lower end of which has attached to it a plug 25, of rubber or other light substance, which floats on the surface of the water in the water-gage q, so as to rise and fall according to the height of the water in the boiler. The upper end of the rod 25 is bent WVhen cury in the vessel 20 and the other branch enters the mercury in the vessel to".

tact of its upper end with the top of the cap 0 is prevented. Two terminals. '1; and Q) are attached to the cup 19, each being provided with a downwardly-extending conducting- Said wires enter the cup 19 and are inserted one in the receiver w and theother in the receiver w, containing the mercury. By this means communication is established between the rod t and the battery z on the one hand and said rod t and the water-feeding apparatus a on the other hand. This the water'is at itslowest level in the boiler and in the water gage or tube q, and the two branches of the fork s are inserted in the mercury in the vessels w and w".

WVhat I claim as new, and desire to secure by Letters Patent, is-

1. The combination, with a steam-boilcr-or an apparatus of asimilar character, and with a manometer or similar instrument attached thereto and an electric battery connected therewith, and an electro-magnet e e and a pivoted lever cl, engaging therewith, of an apparatus a, provided with -a vertically-sliding rod k, having a weight Z suspended from its lower end, and having its upper end connected with the handle of a cook or valve is, communicating with an escape-pipe leading from the boiler, whereby provision is made for the escape of the excess of steam in order to prevent explosion, substantially as herein described.

2. The combination, with a steam-boiler or an apparatus of a similar character, and with a water-gage attached thereto and an electric battery connected therewith, of an apparatus vices of a similar character, for the purpose of automatically feeding water to the boiler, the combination, with the boiler, the water-gage, the water-feeding apparatus, and the battery 2', of the devices inclosed in the chamber 19 and cap 0 and connected therewith, consisting of the vessels in w", and the forked rod 25, carrying the float t, and the washer or collar u, arranged and operating substantially as and for the purpose herein described.

FRANooIs MARTENOT.

WVitnesses:

RoBT. M. HooPER, IsAAo ,PARMENTER. 

